You can savage vulnerable foes so badly they become supernaturally disfigured.
Benefit: Whenever you deal a prone opponent at least 10 points of damage with a natural weapon or unarmed strike, you can savage your foe as a swift action. Your victim becomes disfigured unless it succeeds at a Fortitude save (DC = 10 + 1/2 your character level + your Wisdom modifier). The effects of this disfigurement are identical to those of a bestow curse spell (caster level equal to your character level).
Pathfinder Player Companion: Blood of the Moon © 2013, Paizo Publishing, LLC; Authors: Tim Akers, Neal Litherland, David N. Ross, and Tork Shaw.